Musannaf Ibn Abi Shaybah

Hazrat Umair bin Hani narrates that when Hajjaj bin Yusuf had besieged Hazrat Ibn Zubair, at that time the house of Hazrat Ibn Umar (may Allah be pleased with them) was situated between Hajjaj and Hazrat Ibn Zubair. He would sometimes perform prayer with Hazrat Ibn Zubair and sometimes with Hajjaj.